India, March 14 -- From Tibet to West Bengal, the Brahmaputra is the pulse of communities and ecosystems along its course. But what are the risks the river faces through human interventions, particularly dams, discusses journalist, author and filmmaker Sanjoy Hazarika in his new book, River Traveller. Excerpts from an interview with Down To Earth:

Rajat Ghai (RG): You have spent years criss-crossing the Brahmaputra basin and belong to Assam. What observations have struck you most?

Sanjoy Hazarika (SH): My earliest memories of the river are of its vastness and of seeing dolphins playing in it in Guwahati when I was a child. I have travelled along many rivers around the world, but this is the one I know well and have seen it from the uppe...